Not everyone has camped before, and that's ok. Here are some guidelines to keep from annoying others
campsites
walk around (not through) campsites
wandering into a campsite and surprising the camper is an excellent way to get shot. If you can see them call out in a friendly manner, make a friendly gesture, etc.
set up camp in a campsite, not in the middle of a path or roadway
do not attempt to block access to public campsites, paths, or roads
leaving a tent to save a place while you run to town is ok; leaving a tent so you'll have the space next weekend is not ok
light
turn off exterior RV porch lights and similar light sources if you aren't actively using them
depending on the moon, you may not actually need a flashlight to get around in the dark
if you do use a flashlight keep it on the ground and out of peoples' faces
turn off your vehicle lights asap
there is little to gain from using a flashlight as you sit around a campfire
noise
generator noise is widely despised – restrict their use to daytime hours
wear headphones instead of blasting music
campfires
follow local regulations about making firewood gathering and fire creation
if you burn wood with staples or nails in them, make sure these items stay in the fire ring.